extra vs reserve

extra

noun
  • A run scored without the ball having hit the striker's bat - a wide, bye, leg bye or no ball. 

  • A supernumerary or walk-on in a film or play. 

  • An extra edition of a newspaper, which is printed outside of the normal printing cycle, for example to report an important late-breaking event. 

  • The state or trait of being over the top, of behaving in an overly dramatic manner. 

  • Something additional, such as an item above and beyond the ordinary school curriculum, or added to the usual charge on a bill. 

  • Something of an extra quality or grade. 

adj
  • Beyond what is due, usual, expected, or necessary; extraneous; additional; supernumerary. 

  • Over the top; going beyond what is normal or appropriate, often in a dramatic manner. 

adv
  • To an extraordinary degree. 

det
  • Denotes more. 

reserve

noun
  • A member of a team who does not participate from the start of the game, but can be used to replace tired or injured team-mates. 

  • A reserve price in an auction. 

  • Wine held back and aged before being sold. 

  • A body of troops kept in the rear of an army drawn up for battle, reserved to support the other lines as occasion may require; a force or body of troops kept for an exigency. 

  • Absence of color or decoration; the state of being left plain. 

  • The act of reserving or keeping back; reservation; exception. 

  • A tract of land reserved, or set apart, for a particular purpose 

  • A resist. 

  • Restraint of freedom in words or actions; backwardness; caution in personal behavior. 

  • A preparation used on an object being electroplated to fix the limits of the deposit. 

  • In exhibitions, a distinction indicating that the recipient will get a prize in the event of another person being disqualified. 

  • A tract of land set apart for the use of an Aboriginal group; Indian reserve (compare US reservation.) 

  • Funds kept on hand to meet planned or unplanned financial requirements. 

  • A group or pile of cards dealt out at the beginning of a patience or solitaire game to be used during play. 

  • A natural resource known to exist but not currently exploited. 

verb
  • To keep back; to retain. 

  • To book in advance; to make a reservation. 

  • To keep in store for future or special use. 

How often have the words extra and reserve occurred in a corpus of books? (source: Google Ngram Viewer )